Firefox takes all available CPU power occasionally, and can't quit

[Jarno Suni]

When this happens, I have to kill it by signal 1 to quit firefox processes.
Closing tabs don't help when this happens.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: firefox 26.0+build2-0ubuntu0.13.10.2
ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jarno 1699 F.... panel-10-mixer
BuildID: 20131206145143
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Channel: Unavailable
Date: Mon Jan 6 18:25:25 2014
EcryptfsInUse: Yes
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2013-09-20 (108 days ago)
InstallationMedia: Lubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
IpRoute:
 default via 192.168.0.254 dev wlan0 proto static
 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.101 metric 9
Locales: extensions.sqlite corrupt or missing
MarkForUpload: True
MostRecentCrashID: bp-b022607d-fa4c-4923-a0f0-a0cb42140101
PrefSources:
 prefs.js
 [Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js
Profiles: Profile0 (Default) - LastVersion=26.0/20131206145143
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 google-talkplugin 4.9.1.0-1
 gecko-mediaplayer 1.0.8-4ubuntu1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
RunningIncompatibleAddons: False
SourcePackage: firefox
SubmittedCrashIDs: bp-b022607d-fa4c-4923-a0f0-a0cb42140101
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to saucy on 2013-10-18 (80 days ago)
dmi.bios.date: 09/13/06
dmi.bios.vendor: LENOVO
dmi.bios.version: 63ET13WW
dmi.board.name: CAPELL VALLEY(NAPA) CRB
dmi.board.vendor: LENOVO
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnLENOVO:bvr63ET13WW:bd09/13/06:svnLENOVO:pn89224MG:pvr3000C200:rvnLENOVO:rnCAPELLVALLEY(NAPA)CRB:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:
dmi.product.name: 89224MG
dmi.product.version: 3000 C200
dmi.sys.vendor: LENOVO

[JNH (jordannh)]

What are you doing when it crashes? What kinds of sites? Also, a debug log might be helpful. What I like to do this the following:

user@host:$ script firefox-log.txt
user@host:$ firefox -g

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jarno Suni (jarnos)]

Ok, I can run firefox by command "run" in debugger. I have not been able to reproduce the bug when debugging, yet. Facebook home page seem to be quite heavy, but closing it helps.

[Ilya Volchanetskiy (volchanetskiy)]

From time to time it starts to eat 50% cpu. When I try to close windows it grows to 75%. I found a tool called perf and ran "perf top" (output is attached). I don't really understand how it works but I hope it helps someone to fix the bug.

[Ilya Volchanetskiy (volchanetskiy)]

I finally managed to catch this bug in debugger. After I closed Firefox window there were two threads consuming CPU so I printed their stacktraces. I won't stop process for one day so someone could gather more information by writing me commands to run. (I'm using Firefox 28)

[Paul White (paulw2u)]

Jarno and anyone else affected,

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu and Firefox since that time.

Do you still see a problem related to the one that you reported using an up to date version of Firefox? Please let us know if you do.

If we do not hear from you this bug report will expire in approximately 60 days time.

Thank you for helping make Ubuntu better.

Paul White
[Ubuntu Bug Squad]

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]